de smedt



G, 65o. Patented Jan. 2 2, 1884.

E. J. DE SMBDT. APPARATUS-P03 REFINING ASPHALTUM 'POR PAVIN No. 292.417.-

(No Model.)

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are a large number of melting-kcttle's--usuallyv .IINrTEDSTAi-*Es PATENT Ormea.

EDVARD J. DE SMEDT, OF VASHINGTON, DISTRICT OF COLUlVIBIA.

l APPARATUS FOR REFINING ASPHALTUM FOR PAVING, &c.

SPECIFICATION forming part of Letters Patent No. 292,417, dated January 272, 1824.

Application filed December 28, 1853. (No model.)

.To @ZZ whom, it may concern.-

Be it known that I, EDWARD J. DE SMEDT, of Washington city, in the District of Columbia, have invented a certain new and useful Improvement in Apparatus for Refining Asphaltum for Paving and other Purposes, of which the following is a specification.

My invention has relation to the improvement in refining asphaltum for paving and other purposes for which I have already received Letters Patent dated October 9, 1883, and numbered 286,396; and its object is to obtain an economical and eflicient arrangement of apparatus for carrying out said .patented process.

The nature of my improvement and the manner in which I carry it into practical effect will be readily understood by reference to the accompanying drawings, in which- Figure lis a sectional view of so much of y the apparatus as needed for the purpose of explanation. Fig. 2 is an enlarged sectional view of the steam-ejector used to exhaust the fumes of gases from the kettles.

A is one of a number of furnaces-containing one or more melting-kettles, B, for receiving .cial furnace F, said pipe discharging into the -said furnace through the tuyere y.

In practice, as just above intimated, there sixteen or more-all of which discharge their fumes orgasesintothespecialfurnaceFthrough their own system of pipes, &c. The discharge-tuyeres of these kettles are indicated at y.

The description ofthe connections, &c., of the kettle B, with its furnace A and the special furnaces F, will answer for all the other kettles, the general arrangement of the plant being substantially like that represented in Fig. l of the drawings annexed to my said patent hereinbefore referred to. Pipe d is provided with a controlling cock'or valve, g,

and also with a steam jet or nozzle, e', which enters the pipe at the elbow d', as indicated plainly in Fig. 3. Under this arrangement the steam-jet acts on the principle of an ejector, exhausting the fumes and gases from the kettle and forcing them along into furnace F,- where they are burned.

It becomes a desideratum, particularly with a large number of kettles, each of which must have its own ejector or set of ejectors, to provide means whereby steam can be generated and supplied conveniently, economically7 and efficiently to the ej ectors, at the same time bring- 6o ing the apparatus or plant within as small compass as possible. lo this end I combine with the special furnace F a steam-boiler, G, which is heated by that furnace, and with the steamspace of which the steam-supply pipes of the several ejectors e arein communication, asindicated in the drawings, where 0 is a circular steam-supply pipe communicating with and taking its supply of steam from the steamspace of boiler G, and e2 is a branch pipe (con- 7o trolled by valve h) leadingvfrom o to the ejector e. Thus the steam supplied to the ej ectors, whereby the noxious fumes and vapors are exhausted from the kettles, is generated by the heat evolved in the furnace F, in which those fumes and vapors are consumed.

It may be desired at times to divert the exhausted gases, &c.., taken from any one or more of the kettles into the furnace'A of that kettle, instead of into the special furnace F.

- To this end I lead from the abductor-pipe b of each kettle a pipe, c, (separate and distinct from pipe {1,} which enters the fire-box of its furnace A. Pipe c has a controlling-cock, f, and is provided with an ejector, e, (similar to e,) which in like manner draws its supply of steam from boiler G, and is controlled by a valve, h. This system of pipes, however, may v be dispensed with, if desired.

Having described my improvement, what I claim, and desire to secure by LettersPatent,

1. The combination, with a number of covered melting-kettles and furnaces for heating the same, of the separate special furnace F, the steam-boiler G, heated by the same, conduit d, leading from each kettle to the furnace F, and the ejector e', drawing its supply of steam from said boiler and acting to exhaust the fumes and gases from the kettle roo through said pipe (Z into furnace F, as and for l adapted to operate as and for the purposes Io the purposes hereinbefore set forth. hereinbefore set forth.

2. The combination of the coveredkettles In testimony whereof I have hereunto set B, furnaces A, special furnace F, boiler G, my hand this 21st day of December7 1883. 5 pipes d c ejectors c' c connected with and taking theirZ steam from7 boiler G, and valves or E' 'I' DE SMEDT'V cocks :for controlling the steam-supply, and for Titnessesz directing` the abducted fumes or gas into either EWELL A. DICK7 pipes d or c at will, the whole arranged and J. VALTER BLANDIIORD. 

